Barbell



FIG. 1 is a perspective view of a barbell showing my new design;

FIG. 2 is a left side elevational view thereof shown on a reduced scale;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof, the rear elevational view being substantially identical; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a barbell, as shown and described. 